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14 II ' } 5 'E i i l l Gi` TABLE 1 ROUNDWATER MONITORING DATA Former Beacon Station No 12419 - I 2350 Waterloo R6ad, Stockton, California ethyl- Depth to TOC GW well TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation Number Date ug1L) uglL} u IL) u /L) ug1L) ug1L)i uglL) (u !L) (uglL) (uglL) (u !L} (u !L) ug/L) u !L) (feet) (feet sea level) (feet sea level) Comments Ill 03131!98 780 22 2 32 7 <5 0 nal na na na na na na na 4827 2138 -2689 screened 06/10/98 220 26 18 056 18 <5 01, na na I na na na na na na 42 67 -2129 interval 09108198 3800 420 180 260 280 <0 50�; <0 50 <0 50 '050 <5 o 1<50 <5 0 na na 4721 -2583 Petroleum odor 1 no sheen 65'-85' 11112198 ns ns ns ns ns ns ns II n5il ns ns ns ns ns ns 20 65 wellhead survey 12/30/98 620 18 099 17 14 <5 0 ,I nal na na na na na na na 4556 -2491 slight odor I no sheen 03126199 63 <0 50 <0 50 <0 50 <0 50 <0 50 s; <0 50 <0 50 <0 50 56 '<50 <50 na na 4126 -2061 slight odor 1 no sheen 06/02/99 74 1 7 13 23 078 <0 501- <0 56 <0 50 1050 <5 0 <50 <5 0 31 <0 50 4076 a -2011 slight odor 1 no sheen 08131/99 3000 270 120 260 250 <0 5011 '056 <0 50< 0 50 69 <50 <5 0 48 <0 50 4570 -2505 no comm n 12109199 <50 17 <0 50 <0 50 <0 50 <0 50{1 <0 50 <0 50 <0 50 a5 0 <50 <5 0 12 <0 50 4722 -2657 e t 11 02/21/00 1600 160 350 43 140 <0 50�` <0 50 <0 60 <0 50 c5 0 i<50 10 14 64 4569 -2504 slight odor 1 no sheen 45/18100 <50 <0 50 <0 50 <0 50 <0 50 <0 501 <0 50 <0 50 <0 50 <5 0 <50 <50 na na 4087 -2022 no odor I no sheen 09/26/00 270 92 28 15 16 <50 na na na na na na na na 4899 , -2834 no odor 1 no sheen 12/21/00 830 45 1 9 45 <0 50 <5 0 V na na na na na na na 5 na 4759 2694 slight odor 1 no sheen 03/27/01 280 6 096 072 25 <5 0 ' na na na na na na na na 46 5I4 2589 slight odor!no sheen r 06/26101 2900 270 55 160 330 <0 50 <0 50 <0 50 <0 50 5 S <50 <50 12 <0 50 49 53 -2888 slight odor!no sheen ! 09105101 18000 2700 2000 860 2200 <25 { na na na na na r, na na na 5431 -3366 slight odor I no sheen 11/30101 3500 550 23 100 270 <25 na{ na na na na na na na 5393 -3334 no odor 1 no sheen 02!27102 290 73 36 44 37 <50 na na� na na na na na na 5080 -3021 no odor!no sheen I 05/16102 350 42 26 71 10 <0 50 1'<0 50 <0 50 <0 50 <5 0 <50 <5 0 89 <0 50 5098 2222 -2876 no odor 1 no sheen 09/13102 23000 3300 1600 1200 3200 <5 0 { na 1 na 1 na na na na na na 59 17 -3695 odor 1 no sheen 12/04/02 2000 340 42 20 74 <20 na II na na na na na na na 5725 -35 03 odor 1 no sheen f 02117!03 1100 51 11 17 45 <0 50" na na� na na na na na na 54 27 s -3205 no odor 1 no sheen 06103/03 1400 100" 92 51 77 <0 50 i <0 50 <0 50 '<0 50 <50 <50 <5 0 14 <0 50 5379 -31 57. no odor 1 no sheen 09/18/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm i ,, nm not sampled 11124103 ns ns ns 4 ns ns ns li ns ns ns ns ,ns ns ns ns 5873 3651 not sampled 02123!04 720 33 37 20 30 <D 50 1, <0 5a <0 50 <0 50 <50 <50 <5 0 29 <0 50 5523 -3301 odor 1 no sheen 06/07/04 ns ns ns ns ns ns I;� ns ns ns ns ns ns ns ns 5565 -3343 not sampled 09/07/04 ns ns ns ns ns ns 1. ns i ns ns ns ns ns ns ns 6214 -3992 not sampled ti 12/10104 ns ns ns ns ns ns , nsns ns ns ns ns ns ns 5974 -3752 not sampled 03/09/05 760 50 61 42 49 <0 50 11,I,<0 50 <0 50 <0 50 <50 <50 <5 0 30 <0 50 5610 -3388 odor I no sheen i 05124105 ns ns ns ns ns ns Y ns ns I ns ns ns ns ns ns 5121 -2899 not sampled 08!31105 ns ns ns ns nsns ' ns ns ns ns ns ns ns ns 5645 -3423 not sampled 12117105 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 5350 -3128 not sampled 1 11 i II r r 419gm Prgect 48 P f 16 HORIZON ENVUtOA AL ENC--` �} � O r �